As the title says I have no oil pressure when I start the jeep, takes under a minute and it jumps up to where its suppose to be. In addition it now make a grinding noise (If I had to guess I'd say like a bad bearing) when under 1500 rpms. I did a few searchs and the only noises I found associated with oil pressure is a ticking noise.
So I was thinking either a bad pump or crank bearing and was looking for any input.
97 TJ 4.0 122K mi